Warren Mann trained as a radar officer in Number 3 and 4 courses. His first command was 131RS (Ash Island) and he was posted to 166RS when it was formed in NSW in July 1944. 166RS subsequently landed on Labuan Island with the Australian 9th Division. Until recently Warren maintained and further developed the informative quarterly journal Radar Returns. He had taken on this role after the untimely death of its founder editor/publisher Wing Commander Pete Smith in April 2004. Warren not only maintained the standard set by Pete but also established an internet website, also known as Radar Returns, which gives access to a comprehensive historical record of RAAF WW2 radar units. It will now be a lasting memorial to him. Warren and his wife Helen (another radar vet) have organised and/or attended many Australia wide reunions as well as collecting and preserving radar history.

More recently he was involved in fixing a commemorative plaque for Pete Smith at the Point Cook RAAF Museum which houses and safeguards hard copy RAAF radar records and memorabilia.